Question

Solve using substitution:
9y - x - 8 = 0
-3x + 7y = -16

Answer 1

(-8, 0)
(1, 1)
(0, 8/9)
(10, 2)

Answer 2

from equation 1 write the expression for the variable x then substitute this in the 2nd equation

Answer 3

this gives one equation with one variable; solve for y

Answer 4

now put this value in the expression to find x

Answer 5

do you need more help or can you follow these directions to get D?

Answer 6

It is also a good practice to check your answer in the original

Answer 7

(10,2)
Heres your check by plugging it into the equation:
9y-x-8= 0
9(2) - 10 - 8 = 0
18-10-8=0
-3x + 7y = -16
-3(10)+7(2)=-16
-30+14=-16